event: rename event_XXX with gf_ prefixed

I hit one crash issue when using the libgfapi.

In the libgfapi it will call glfs_poller() --> event_dispatch()
in file api/src/glfs.c:721, and the event_dispatch() is defined
by libgluster locally, the problem is the name of event_dispatch()
is the extremly the same with the one from libevent package form
the OS.

For example, if a executable program Foo, which will also use and
link the libevent and the libgfapi at the same time, I can hit the
crash, like:

kernel: glfs_glfspoll[68486]: segfault at 1c0 ip 00007fef006fd2b8 sp
00007feeeaffce30 error 4 in libevent-2.0.so.5.1.9[7fef006ed000+46000]

The link for Foo is:
lib_foo_LADD = -levent $(GFAPI_LIBS)
It will crash.

This is because the glfs_poller() is calling the event_dispatch() from
the libevent, not the libglsuter.

The gfapi link info :
GFAPI_LIBS = -lacl -lgfapi -lglusterfs -lgfrpc -lgfxdr -luuid

If I link Foo like:
lib_foo_LADD = $(GFAPI_LIBS) -levent
It will works well without any problem.

And if Foo call one private lib, such as handler_glfs.so, and the
handler_glfs.so will link the GFAPI_LIBS directly, while the Foo won't
and it will dlopen(handler_glfs.so), then the crash will be hit everytime.

The link info will be:
foo_LADD = -levent
libhandler_glfs_LIBADD = $(GFAPI_LIBS)

I can avoid the crash temporarily by linking the GFAPI_LIBS in Foo too like:
foo_LADD = $(GFAPI_LIBS) -levent
libhandler_glfs_LIBADD = $(GFAPI_LIBS)

But this is ugly since the Foo won't use any APIs from the GFAPI_LIBS.

And in some cases when the --as-needed link option is added(on many dists
it is added as default), then the crash is back again, the above workaround
won't work.

Backport of:
> https://review.gluster.org/#/c/glusterfs/+/23110/
> Change-Id: I38f0200b941bd1cff4bf3066fca2fc1f9a5263aa
> Fixes: #699
> Signed-off-by: Xiubo Li <xiubli@redhat.com>

Change-Id: I38f0200b941bd1cff4bf3066fca2fc1f9a5263aa
updates: bz#1740525
Signed-off-by: Xiubo Li <xiubli@redhat.com>
(cherry picked from commit 799edc73c3d4f694c365c6a7c27c9ab8eed5f260)

1 files changed, 10 insertions, 10 deletions

diff --git a/libglusterfs/src/libglusterfs.sym b/libglusterfs/src/libglusterfs.sym
index a921b4133a9..2d2466377cd 100644
--- a/libglusterfs/src/libglusterfs.sym
+++ b/libglusterfs/src/libglusterfs.sym
@@ -442,16 +442,16 @@ eh_dump
 eh_new
 eh_save_history
 entry_copy
-event_dispatch
-event_dispatch_destroy
-event_handled
-event_pool_destroy
-event_pool_new
-event_reconfigure_threads
-event_register
-event_select_on
-event_unregister
-event_unregister_close
+gf_event_dispatch
+gf_event_dispatch_destroy
+gf_event_handled
+gf_event_pool_destroy
+gf_event_pool_new
+gf_event_reconfigure_threads
+gf_event_register
+gf_event_select_on
+gf_event_unregister
+gf_event_unregister_close
 fd_anonymous
 fd_anonymous_with_flags
 fd_bind